The use of active Brownian particles as phenomenological models actually goes well beyond molecular machines, especially when it extends to include interactions between active particles [1]}, [2]}, [3]}, [4]}, [5]}. Active particles can serve as simple models for entire living organisms [6]}, [4]} or even as candidates for a minimal model of cognition [8]}. Within physics, the concepts of active particles have been helpful in developing stochastic thermodynamics [9]}, [10]}, [11]}, [12]}, [13]}, and they represent the simplest limit of `active matter' in general [14]}, [15]}, [16]}, [17]}.
